It's a bit too early for brown patch, but we never say never with turfgrass diseases.  However, our environmental conditions place other possible diseases on the table.  With that said, there is no way to make an accurate diagnosis based on pictures and an accurate identification is critical for any fungicide recommendation.

I'd urge that you send a sample to our OSU Plant and Pest Diagnostic Clinic.   You will find the instructions on how to take and send a viable sample on their website:  https://ppdc.osu.edu/